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1. 1. 1. 2 Prescaler
The prescaler is used to reduce the effective input sampling rate, capturing 1 out of n samples and
discarding the rest. The resulting sampling rate is as follows:
where:
Programming Information
Function Name
channelPrescalerConfig
Table 4: Programming functions related to the input prescaler
Keysight M31XXA/M33XXA Digitizer User's Guide
is final effective sampling frequency
is the
Clock System
is an integer value (4 bits)
Advanced: Prescaler vs. Downsampling/Decimation: The
prescaler cannot be considered as a full decimation or
downsampling block, as it does not contain any filter and
therefore it generates aliasing. For applications were full
downsampling is required, the user must choose an IF Keysight
Digitizer or Transceiver, which provide DDC (Digital Down
Conversion).
Comments
It configures the input prescaler
1 Theory of Operation: M31/M33XX Digitizers
Details
channelPrescalerConfig (page 46)
5
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